[INFO] updating cached repository vfrz/LearningRust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vfrz/LearningRust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vfrz/LearningRust" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/vfrz/LearningRust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/vfrz/LearningRust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vfrz/LearningRust" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/vfrz/LearningRust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/vfrz/LearningRust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 927808d45c0ca91c914c2e5e875e9323ca17b1a4
[INFO] sha for GitHub repo vfrz/LearningRust: 927808d45c0ca91c914c2e5e875e9323ca17b1a4
[INFO] validating manifest of vfrz/LearningRust on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of vfrz/LearningRust on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing vfrz/LearningRust
[INFO] finished frobbing vfrz/LearningRust
[INFO] frobbed toml for vfrz/LearningRust written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/vfrz/LearningRust/Cargo.toml
[INFO] started frobbing vfrz/LearningRust
[INFO] finished frobbing vfrz/LearningRust
[INFO] frobbed toml for vfrz/LearningRust written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/vfrz/LearningRust/Cargo.toml
[INFO] crate vfrz/LearningRust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking vfrz/LearningRust against try#f45cc3094ee337acd688771b9234318046b0572d for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-0/try#f45cc3094ee337acd688771b9234318046b0572d:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/vfrz/LearningRust:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f026e1f2a48df47e1f5ab81255b33cb78d2ffa243972e78d28a02e94d4183f72
[INFO] running `"docker" "start" "-a" "f026e1f2a48df47e1f5ab81255b33cb78d2ffa243972e78d28a02e94d4183f72"`
[INFO] [stderr]    Compiling regex v0.2.10
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking regex-syntax v0.5.3
[INFO] [stderr]     Checking learning_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/request_parser/mod.rs:74:17
[INFO] [stderr]    |
[INFO] [stderr] 74 |             let mut p = &p[0];
[INFO] [stderr]    |                 ----^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/template_engine/mod.rs:15:17
[INFO] [stderr]    |
[INFO] [stderr] 15 |             let mut p1 = &p[1];
[INFO] [stderr]    |                 ----^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/template_engine/mod.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |             let mut p2 = &p[2];
[INFO] [stderr]    |                 ----^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/request_parser/mod.rs:74:17
[INFO] [stderr]    |
[INFO] [stderr] 74 |             let mut p = &p[0];
[INFO] [stderr]    |                 ----^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/template_engine/mod.rs:15:17
[INFO] [stderr]    |
[INFO] [stderr] 15 |             let mut p1 = &p[1];
[INFO] [stderr]    |                 ----^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/template_engine/mod.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |             let mut p2 = &p[2];
[INFO] [stderr]    |                 ----^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.20s
[INFO] running `"docker" "inspect" "f026e1f2a48df47e1f5ab81255b33cb78d2ffa243972e78d28a02e94d4183f72"`
[INFO] running `"docker" "rm" "-f" "f026e1f2a48df47e1f5ab81255b33cb78d2ffa243972e78d28a02e94d4183f72"`
[INFO] [stdout] f026e1f2a48df47e1f5ab81255b33cb78d2ffa243972e78d28a02e94d4183f72